Two important factors: the opening and the focal length of Digital SLR Camera Lens

Enter level digital SLR users want the camera lens is often confused. Not to mention the brand and type of lens is the digital SLR camera body, models of lenses, a variety of formats and I have often heard, as someone told me to complain: I do not understand. So, how to understand the basic data of a target? In reality, we need to know only two dates. First is the focal length, the second is that of the panel.

the first factor to decide if they can be taken. Tolike the digital SLR lens is a wide-angle lens bundle. With this objective, you want the divide between the remote scene is tight is not possible because the focal length is not enough. As another example, a telephoto lens to shoot people at home, you can not, unless your house is a large house, living a few hundred square meters, in a small room, only the wide-angle lens included under the perspective wider.

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The iris is different. Decidedif the picture is good. a large aperture lens aperture generally higher quality than the lens aperture, and a large aperture lens closed, the speed in low light conditions or on the move (as the car shooting, game, etc.) to better results. For example, if you have a large aperture lens, you can create a portrait shoot very natural and soft bokeh. If the diaphragm is smaller, you can also take pictures, but the picture is so soft and natural.

Note: The solidFocus of the lens focal length and aperture of only a label maximum. For example, 50mm/F1.8, it means that the focus of 50 mm, maximum aperture is F1.8. But the label has a zoom lens with two focal length and maximum aperture. For example, Tamron 18-270mm F3.5-6.3, as is the wide end of focal length is 18 mm, and the maximum aperture F3.5 telephoto focal length is 55 mm, maximum aperture is F5.6.

Two important factors: the opening and the focal length of Digital SLR Camera Lens